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Thread: Best method to reroute 1/2" copper supply line to allow Vent duct through wall?

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  1. #1
    DIY Junior Member DIY007's Avatar
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    Default Best method to reroute 1/2" copper supply line to allow Vent duct through wall?

    Long story short: The wife bought an Over the range Microwave with a built in fan that can be ducted to the outside. My present cooktop has a down draft vent that I was going to try and reuse the exterior wall hole if possible. This is an exterior wall.

    To my surprise, when I opened the sheetrock above the cooktop to work on the ducting for the microwave, a 1/2 copper pipe going to the second floor was dead centered staring back at me ! This pipe goes all the way down to about 12" inches off the floor and then does a "T" and goes through the studs on both sides. The down draft vent duct is right below the "T".

    At this point I am abandoning trying to use the existing duct outlet at the bottom of the exterior wall because of the pipe. So I want to duct the microwave horizontally straight through the wall, the copper pipe is dead center between 2 studs 16" apart.

    I was thinking to just use 4 90 degree copper elbows and route it to the side of a stud for 12-18" and then back out to the center. The guy at the big box store was telling me to use a sharkbite 18" flexible ss braided hose, but I don't feel comfortable having a braided hose inside a wall. I feel better with rigid pipe - he was then suggesting using the sharkbite rigid elbows, that would make life easier for me, but I have no issues with just soldering, and usually when I take the easy way, it comes back to haunt me.

    What is the best way and method you would use to re-route this pipe?

    I still cannot believe they placed a pipe deadcenter behind the cooktop!

    Thanks,
    DIY007

  2. #2
    Forum Admin, Expert Plumber Terry's Avatar
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    With 1/2" copper pipe and four 90's, I would just solder it.
    It doesn't get easier then torching 1/2". They heat up real well.

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